5. ni'DRAsns. 225 



5. Hydraspis radiolata. 



Erays radiolata, Mikan, Dah-ct. Faun. Flur. lints, pi. — (18:20). 

 ChJlodiiui i-iuliolata, Fifzin;/. N. CUi-fs. licpt. p. \~) (1820). 

 Hydraspis radiulata, fu-dij, Si/tt. Itcpt. p. 41 (18."51). 

 I'iateuiy.s gaudichaiidii, iJton. ^- Bibr. ii. p. 4:27 (183-3). 

 Hydraspis gaudichaiidii, Gray, Cat. Tort, p, 40 (1844), ayid S/i. 

 liept. i. p. 57 {\Sbo),andAn7i.S)- May. N. II. (4) xi. p. 304 (1873). 



Carapace with a feeble vertebral keel ; dorsal shields of half- 

 grown specimens with radiating stri;e. Front lobe of plastron 

 broader than hind lobe ; intergular shield at least as long as its 

 distance from the abdominals ; suture between the pectorals shorter 

 than that between the abdominals. Hkiij of upper surface of head 

 divided into irregular shields ; parietal bones above as wide as the 

 diameter of the orbit ; mental barbels shorter than the diameter of 

 the eye. Dark brown above ; lower surfaee of marginals yellow ; 

 plastron yellow, with a large subrhomboidal dark brown spot in the 

 middle ; tympanum, chin, and throat yellowish, with small brown 

 spots. Adult unknown. 



Brazil. 



a. Yg., spir. Bahia. 



G. Hydraspis rufipes. 



Emys rufipes, Spix, Test. Bras. p. 7, pi. vi. (1824). 



Rliiuemys rufipes, Wayl. Syst. Amph. pi. iii. tigs, xliii.-lv. (1830). 



Ilvdraspis rufipes, Gray, Syn. liept. p. 41 (1831), and S/i. licjjf. i. 



p. 5G (1855). 

 Platemys rufipes, Dmn. ^- Bibr. ii. p. 433 (1835). 

 Pbrynops rufipes, Gray, Cat. Tort. p. 41 (1844). 



Cara])ace with a vertebral keel. Front lobe of plastron broader 

 than hind lobe; intergular shield much shorter than its dis- 

 tance from the abdominals ; suture between the pectorals longer 

 than that between the abdominals. Forehead and vertex covered 

 with undivided skin ; parietal bones expanded ; mental barbels 

 shorter than the diameter of the eye. lirowu above, yellowish 

 inferiorly ; throat and limbs rufous. 



Length of shell 25 centim. 



River Solimoens, Brazil. 



7. Hydraspis wagleri. 



Platemys wagleri, Dam. ^- Bibr. ii. p. 422 (1835). 

 Hydra.-pis wagleri, Gray, Cat. ToH. p. 40 (1844), and Sh. Rept. i, 

 p. 50 (1855). 



Carapace much elongate, much narrowed at both ends, not keeled. 

 Plastron broader in front than behind ; suture between the pectoral 

 shields shorter than that between the abdominals. Forehead and 

 vertex covered with undivided skin. Shell rufous above, edged 

 with yellow, yellow inferiorly ; upper surface of head and limbs 



